Evidence for Statistical Production of J/psi Mesons in Nuclear Collisions at 158--200 A GeV

TL;DR

This paper investigates whether J/psi mesons are produced statistically during hadronization in nuclear collisions at CERN SPS energies, finding a consistent hadronization temperature and explaining observed particle ratios.

Contribution

It introduces and tests a statistical production model for J/psi mesons, aligning with experimental data and previous temperature estimates.

Findings

Hadronization temperature T_H = 175 MeV consistent with prior estimates.

The model explains the scaling behavior of J/psi to pion ratios.

Supports the hypothesis of statistical J/psi production at hadronization.

Abstract

The hypothesis of statistical production of J/psi mesons at hadronization is formulated and checked against experimental data. It explains in the natural way the observed scaling behavior of the J/psi to pion ratio at the CERN SPS energies. Using the multiplicities of J/psi and eta mesons the hadronization temperature T_H = 175 MeV is found, which agrees with the previous estimates of the temperature parameter based on the analysis of the hadron yield systematics.